MagTek MCP - Manual (Page 42)

MCP Serial Transport Protocol
36
Error Recovery
Error Recovery Using R-poll – data frame lost
(connection was established and some data may have been exchanged)
I (0,0)
ÆXÆ (Rule 4.1)
(bwt)
R (0)-poll
ÆÆÆ
(Rule 5.2)
ÅÅÅ R (0)
(Rule 5.4a)
I (0,0)
ÆÆÆ
(Rule 5.5b)
ÅÅÅ R (1)
(Rule 4.7)
(data is transferred successfully according to Rule 4.8)
Error Recovery Using R-poll – response frame lost
(connection was established and some data may have been exchanged)
I (0,0)
ÆÆÆ
(Rule 4.1)
ÅXÅ R (1) (Rule 4.7)
(bwt)
R (0)-poll
ÆÆÆ
(Rule 5.2)
ÅÅÅ R (1)
(Rule 5.4a)
(data is transferred successfully according to Rule 5.5a)
Error Recovery Using I-frame resend – data frame lost
(connection was established and some data may have been exchanged)
I (0,0)
ÆXÆ
(Rule 4.1)
(bwt)
I (0,0)
ÆÆÆ
(Rule 5.3)
ÅÅÅ R (1)
(Rule 4.7)
(data is transferred successfully according to Rule 4.8)
Error Recovery Using I-frame resend – response frame lost
(connection was established and some data may have been exchanged)
I (0,0)
ÆÆÆ
(Rule 4.1)
ÅXÅ R (1) (Rule 4.7)
(bwt)
I (0,0)
ÆÆÆ
(Rule 5.3)
ÅÅÅ R (1) (Rule 4.7)
(data is transferred successfully according to Rule 4.8)